Instructions for webinar participation will be provided by
GoToWebinars.com, not NRMCA. Please add them to your
contacts in order to ensure proper delivery. Login
instructions
will be sent within two business days of registration.
System
Requirements
PC-Based Attendees │
REQUIRED: Windows® 2000, XP Home, XP Pro, 2003 Server.
Macintosh®-Based Attendees
│ REQUIRED: Mac OS® X 10.3.9 (Panther®) or newer.
Webinar Description:
The maturity method, which is covered by
ASTM C1074, is a technique for estimating in-place strength development at
early ages by measuring in-place temperature history. By using the maturity
method, contractors can account for the increased rate of in-place strength
development due to heat of hydration. During cold weather, the method
provides an indication of whether the concrete has reached the strength
needed to support construction loads. This course will explain the basic
principles and terminology of the maturity method and review the different
ways that the temperature history can be used to determine the maturity
index. The procedure for developing a project-specific relationship between
concrete strength and maturity index will be presented. The limitations of
the methods will also be discussed.
Webinar Topics:
Case studies of construction failures
due to low early-age strength
Effects of temperature on concrete
strength
Principle of the maturity method and
terminology
Functions used to convert temperature
history to a maturity index
How to develop the best maturity
function
How to develop the relationship between
strength and maturity
Verification of strength-maturity
relationship during construction
How
You Will Benefit:
This webinar will provide attendees with an understanding of a simple way to
monitor strength development in newly-placed concrete. For the concrete
producer, the maturity method is a tool for understanding how strength
development of different mixtures is affected by temperature. For the
contractor, the maturity method is a tool for planning construction
schedules under different scenarios. For the engineer, the maturity method
provides a simple means to assess whether in-place strength should be
sufficient for safe application of construction loads.
At the end of the course, attendees will be able to understand:
The differences between the two
maturity functions in ASTM C1074.
How to develop the strength-maturity
relationship.
How to develop an accurate maturity
function for a particular combination of cementitious materials.
How to verify estimated strengths.
The limitations of the maturity method.
Who
should attend?
This webinar will be of value to concrete producers, concrete contractors,
and engineers.
Presenter Bio:
Dr. Nicholas J. Carino specializes in
condition assessment and concrete construction technology. He has over 25
years of experience as a research structural engineer at the National
Institute of Standards and Technology (NIST). His experience includes
nondestructive testing, in-place evaluation, the maturity method, standard
test methods. He conducted groundbreaking research that led to the
development of the impact-echo test method.
Dr. Carino has participated in the investigations of major construction
failures, led the structural assessment of the U.S. Embassy in Moscow, and
examined the properties of fireproofing for the NIST investigation of the
9/11 World Trade Center collapse.
Dr. Carino is a four-time winner of the ACI Wason Medal for research on the
maturity method, the impactecho method and behavior of high-strength
concrete at high temperatures. He has held numerous leadership positions
within committees of the American Concrete Institute and ASTM International.
In recognition of his contributions, he has received numerous awards from
ACI and ASTM.
Dr. Carino was an assistant professor at The University of Texas at Austin
and was recognized for his teaching abilities. He is well known for his
written and verbal communication skills and is co-editor of the Handbook on
Nondestructive Testing of Concrete.
Practice Areas
Concrete Materials Technology
Condition Assessment
Failure Investigation
Laboratory Testing
Litigation Support
Materials Evaluation and Research
Nondestructive Evaluation
Research and Testing
Representative Projects
Failure
Investigations and Condition Assessments
Harbor Cay Condominium Collapse, Cocoa
Beach, Florida
Riley Road Ramp Collapse, East Chicago,
Indiana
Structural Assessment of New U.S.
Embassy Office Building in Moscow
Member of NIST investigation of World
Trade Center collapse
Research
Developed technical underpinning
leading to the development of the first standard on the maturity method
(ASTM C1074)
Initiated ground breaking research that
led to the development of the impact-echo method (ASTM C1383)
Fundamental investigations of the
pullout test method
Effects of testing variables on
measured compressive strength of high-strength concrete
Curing of high-performance concrete
Applications of infrared thermography
for NDT of fiber reinforced polymer composites
Technical Committees
American Concrete
Institute
Board of Direction (Past Member)
Technical Activities Committee (Past
Member)
TAC Specifications Committee (Past
Chair)
ACI 228- Nondestructive Testing (Past
Chair)
ACI 301- Specifications for Structural
Concrete
ACI 318A- Structural Concrete Building
Code
ASTM International
C09 - Concrete and Concrete Aggregates
(Past Chair)
C09.90 - Executive Subcommittee
C09.24 - Nondestructive and In-Place
Testing (Past Chair)
C09.61 - Testing for Strength (Task
Group Chair)
Awards
Fellow American Concrete Institute
Fellow ASTM International (Award of
Merit)
ACI – Delmar L. Bloem Distinguished
Service Award
ACI – Robert E. Philleo Award
ACI – Arthur R. Anderson Award
ACI – Wason Medal for Materials
Research (4 times)
